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【单选题】
下列关于酶描述正确的是A.
酶都需要辅助因子
B.
所有蛋白质都具有酶的活性
C.
同工酶是结构与功能相同的酶
D.
酶对底物有严格选择性
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皮皮学刷刷变学霸
举一反三
【单选题】I often have conversations with John over telephone, while keep in touch with Tom by__________ letter.
A.
不填;;the
B.
不填;a
C.
the;不填
D.
the; a
【简答题】Perfect Competition
【单选题】Which is the most appropriate translation for "a Dear John letter"?
A.
给约翰的情书
B.
绝命书
C.
绝交信
D.
感谢信
【简答题】08练习-欢迎词.doc 这是训练资料8,不是书面作业,供各位同学课后训练用,不需上交。
【单选题】听力原文：M: I am afraid John is busy at the moment, madam. W: Oh, dear. John always does my hair. Q: What do we know about John? (3)
A.
John is a close friend of the woman's.
B.
John is the best hairdresser in town.
C.
John is a hairdresser.
D.
John often helps the woman.
【单选题】Which is the most appropriate translation for "a Dear John letter"?
A.
绝命书
B.
绝交书
C.
给约翰的情书
D.
感谢信
【简答题】There has never been perfect happiness. The perfect status of human beings does not exist. Whatever else happiness may be, it lies neither in possession nor achievement, but in the pursuing process. W...
【单选题】乳母的合理膳食原则应充分考虑其营养需要特点,在下列描述中错误的是
A.
食物品种要多样化
B.
蛋白质应全部来源于优质蛋白质
C.
增加含钙丰富食品
D.
多吃新鲜蔬菜和水果
E.
少吃盐、腌制品和刺激性强的食物
【单选题】A“Dear John”letter is a letter of ____.
A.
love
B.
invitation
C.
rejection
D.
introduction
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